CN115083809A - Arc extinguishing chamber surface treatment method and arc extinguishing device - Google Patents
Arc extinguishing chamber surface treatment method and arc extinguishing device Download PDFInfo
- Publication number
- CN115083809A CN115083809A CN202210886390.1A CN202210886390A CN115083809A CN 115083809 A CN115083809 A CN 115083809A CN 202210886390 A CN202210886390 A CN 202210886390A CN 115083809 A CN115083809 A CN 115083809A
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- arc
- rubber
- chamber
- extinguishing chamber
- treatment method
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H2009/305—Means for extinguishing or preventing arc between current-carrying parts including means for screening for arc gases as protection of mechanism against hot arc gases or for keeping arc gases in the arc chamber
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
- Insulators (AREA)
Abstract
The application provides an arc extinguishing chamber surface treatment method and arc extinguishing device, include to establish an annular shielding net at the explosion chamber outside cover, this annular shielding net and the built-in shield cover equipotential of explosion chamber are connected, wash the heating back with it again, at surface cladding silicon rubber, obtain the rubber coating explosion chamber, then right the silicon rubber on rubber coating explosion chamber surface carries out activation treatment, obtains the rubber coating explosion chamber after the activation, and is right the rubber coating explosion chamber after the activation injects epoxy, then solidifies, natural cooling again. This application on the one hand leads to the epoxy material in the middle of through the electric field intensity on annular shielding net with the inboard silicon rubber surface of annular shielding net, increases the dielectric strength of explosion chamber through shielded mode, and on the other hand adopts plasma activation to the silicon rubber on explosion chamber surface, then carries out the epoxy pouring, further solves 35kV solid insulation explosion chamber and prolongs a problem of discharging.
Description
Technical Field
The application relates to the technical field of power equipment, in particular to an arc extinguishing chamber surface treatment method and an arc extinguishing device.
Background
The solid cabinet is called solid insulation ring main unit, which uses solid insulation material as main insulation medium, the vacuum arc extinguish chamber and its conductive connection, isolation switch, grounding switch, main bus, branch bus, etc. main conductive loop are single or combined and encapsulated by solid insulation medium to be one or several modules with certain function, capable of being combined or expanded again, possessing full insulation and full sealing performance, then the accessible module surface is coated with conductive or semi-conductive shielding layer and can be directly and reliably grounded.
Along with the higher and higher performance requirements of related departments on the ring main unit, the solid cabinet with high reliability receives more and more extensive attention due to the technical advantages of the solid cabinet. At present, the insulation technology of a 12kV solid cabinet is mature, but the 35kV solid cabinet has no great progress all the time, and the main reason is that the 35kV solid insulation ring main unit is damaged to different degrees after the power frequency withstand voltage is 95kV/1min and the lightning impact is +/-185 kV. The disassembly finds that the damage positions are mainly concentrated on the periphery of the arc extinguish chamber, and unrecoverable insulation damage occurs on the surface of the arc extinguish chamber when the fracture insulation of the arc extinguish chamber is tested.
The arc extinguish chamber in the prior art is usually provided with a shielding system, the shielding system comprises a shielding cover which is a semi-arc curved surface inside the arc extinguish chamber, so that the electric field distribution is uniform, the recovery speed of the gap insulation strength after the arc is accelerated, the breaking capacity of the arc extinguish chamber is improved, and the inner surface of a shell is protected from being insulated. However, the problem of insulation damage caused by serious surface extension creepage of the arc extinguish chamber in the 35kV solid cabinet needs to be solved urgently.
Disclosure of Invention
The application provides an arc extinguishing chamber surface treatment method and an arc extinguishing device, which aim to solve the problem of serious creepage of an arc extinguishing chamber extension surface in the existing 35kV solid cabinet.
The application provides an arc extinguish chamber surface treatment method in a first aspect, which comprises the following steps:
an annular shielding net is sleeved on the outer side of the arc extinguish chamber and is in equipotential connection with an internal shielding cover of the arc extinguish chamber;
cleaning and heating the obtained product obtained in the step, and coating silicon rubber on the surface to obtain a rubber-coated arc-extinguishing chamber;
activating the silicon rubber on the surface of the rubber-coated arc-extinguishing chamber to obtain an activated rubber-coated arc-extinguishing chamber;
and injecting epoxy resin into the activated encapsulation arc-extinguishing chamber, then curing, and naturally cooling.
Optionally, the step of activating the silicon rubber on the surface of the encapsulation arc-extinguishing chamber to obtain an activated encapsulation arc-extinguishing chamber includes:
standing the rubber-coated arc-extinguishing chamber in an oven at 70-80 ℃ for 1-5 hours;
polishing the surface silicon rubber of the rubber-coated arc-extinguishing chamber;
cleaning the surface of the rubber-coated arc-extinguishing chamber with alcohol, and then placing the rubber-coated arc-extinguishing chamber in a 100-150 oven for standing for 2 hours;
and (3) placing the rubber-coated arc-extinguishing chamber processed in the steps on a rotary worktable to rotate along the axial direction, and then carrying out plasma treatment by using a plasma emitter to obtain the activated rubber-coated arc-extinguishing chamber.
Optionally, the rotating speed of the rotating table is 50 rpm.
Optionally, the moving speed of the plasma nozzle of the plasma emitter along the axial direction of the arc extinguish chamber is 100mm/min, and the plasma emitter performs reciprocating motion along the axial direction of the arc extinguish chamber for 2 times to complete spraying.
Optionally, the gas flow speed at the nozzle of the plasma emitter is 10 m/s.
Optionally, the material of annular shielding net is electrically conductive or semi-conductive material, annular shielding net is through one or more metal posts and the built-in shield cover fixed connection of explosion chamber, the center pin syntropy of annular shielding net and the center pin of explosion chamber.
Optionally, the distance from the annular shielding net to the surface of the silicone rubber of the encapsulated arc-extinguishing chamber is greater than or equal to 5 mm.
Optionally, the curing temperature of the curing is 120 ℃, and the curing time is 24 h.
Optionally, the epoxy resin is bisphenol a epoxy resin.
The second aspect of the present application provides an arc extinguishing apparatus, which is prepared by the arc extinguishing chamber surface treatment method provided by the first aspect of the present application.
According to the scheme, the annular shielding net is sleeved outside the arc extinguish chamber, the annular shielding net is connected with the built-in shielding cover of the arc extinguish chamber in an equipotential mode, the arc extinguish chamber is cleaned and heated, the surface of the arc extinguish chamber is coated with silicon rubber to obtain the rubber-coated arc extinguish chamber, the silicon rubber on the surface of the rubber-coated arc extinguish chamber is activated to obtain the activated rubber-coated arc extinguish chamber, and the activated rubber-coated arc extinguish chamber is injected with epoxy resin, then is cured and is naturally cooled. This application on the one hand leads to the epoxy material in the middle of through the electric field intensity on the silicon rubber surface of annular shielding net inboard, increases the dielectric strength of explosion chamber through the mode of shielding. On the other hand, the silicon rubber on the surface of the arc extinguish chamber is subjected to plasma activation treatment and then epoxy casting, so that the problem of surface extension discharge of the 35kV solid insulation arc extinguish chamber is further solved.
Drawings
Fig. 1 is a schematic flow chart of a method for processing a surface of an arc extinguish chamber according to an embodiment of the present application;
fig. 2 is a schematic structural view of a ring shield king provided in an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to examples.
It will be appreciated by those skilled in the art that the following examples are illustrative of the present application only and should not be taken as limiting the scope of the present application. The examples do not specify particular techniques or conditions, and are performed according to the techniques or conditions described in the literature in the art or according to the product specifications. The materials or equipment used are not indicated by manufacturers, and all are conventional products available by purchase.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, "connected" as used herein may include wirelessly connected. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present application, "a plurality" means two or more unless otherwise specified. The terms "inner," "upper," "lower," and the like, indicate an orientation or a state relationship based on that shown in the drawings, merely for convenience of describing the application and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.
In the description of the present application, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted", "connected" and "provided" are to be interpreted broadly, e.g. as a fixed connection, a detachable connection or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. To those of ordinary skill in the art, the specific meaning of the above terms in the present application is to be understood as a matter of context.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. In order to facilitate the technical solution of the present application, some concepts related to the present application will be described below.
Referring to fig. 1, a first aspect of the embodiments of the present application provides a method for treating a surface of an arc extinguish chamber, including steps S1 to S4.
And S1, sleeving a ring-shaped shielding net 20 outside the arc extinguish chamber 10.
Referring to fig. 1, in the embodiment of the present application, a ring-shaped shielding net 20 is firstly sleeved outside an arc extinguish chamber 10, the ring-shaped shielding net 20 is made of a conductive or semiconductive material, and a central axis of the ring-shaped shielding net 20 is in the same direction as a central axis of the arc extinguish chamber 10. The annular shielding net 20 is connected with the built-in shielding case 11 of the arc extinguish chamber 10 in an equipotential manner.
Optionally, in the embodiment of the application, a welding mode is adopted, the annular shielding net 20 is fixedly connected with the arc extinguish chamber built-in shielding case 11 through one or more metal posts 21, and after welding is completed, a universal meter is adopted to confirm that the annular shielding net 20 is equipotentially connected with the arc extinguish chamber 10 built-in shielding case 11.
Optionally, the width of the annular shielding net 20 in the axial direction of the embodiment of the present application is 43mm, and the distance from one side of the annular shielding net 20 to the metal column is 15 mm.
And S2, cleaning and heating the product obtained in the step, and coating the surface with the silicon rubber 30 to obtain the encapsulated arc-extinguishing chamber.
Cleaning and heating the arc extinguish chamber introduced into the annular shielding net 20, cleaning the surface by using absolute ethyl alcohol, and then placing the arc extinguish chamber in a drying oven with the temperature of 80 +/-5 ℃ for standing for 20 min. And (3) after standing, performing a rubber coating process to obtain a rubber-coated arc-extinguishing chamber, wherein a layer of silicon rubber 30 is coated on the outer side of the rubber-coated arc-extinguishing chamber.
The distance from the annular shielding net 20 of the embodiment of the application to the surface of the silicon rubber 30 of the encapsulated arc-extinguishing chamber is greater than or equal to 5 mm. Referring to fig. 2, in a portion of the preferred embodiment, the distance of the annular shielding mesh 20 to the silicone rubber surface 30 of the encapsulated arc chute is equal to 5 mm.
And S3, activating the silicon rubber 30 on the surface of the encapsulated arc-extinguishing chamber to obtain the activated encapsulated arc-extinguishing chamber.
The prior art is generally limited to coating a couplant on the surface of silicon rubber on the surface of an arc extinguish chamber, the production method for coating the couplant cannot meet the production and manufacturing of a 35kV solid insulating part, and the arc extinguish chamber surface of the solid insulating part coated with the couplant has serious creepage and cannot achieve the insulating effect generally. According to the embodiment of the application, the silicon rubber is subjected to activation treatment, and then epoxy resin casting production is performed after the activation treatment.
After the encapsulation process is completed, the embodiment of the application carries out activation treatment on the encapsulation process, and the activation treatment comprises the following steps:
s301, standing the rubber-coated arc-extinguishing chamber in an oven at 70-80 ℃ for 1-5 hours.
S302, polishing the surface silicon rubber 30 of the encapsulation arc-extinguishing chamber. Alternatively, sand blasting or shot blasting is used, for example, 20 mesh steel grit blasting for 15 minutes.
S303, after the surface of the rubber-coated arc-extinguishing chamber is cleaned by alcohol, the rubber-coated arc-extinguishing chamber is placed in a 100-150 baking oven and stands for 2 hours, and optionally, the rubber-coated arc-extinguishing chamber is placed in a 120 ℃ baking oven for 2 hours.
S304, the rubber-coated arc-extinguishing chamber processed in the steps is placed on a rotary workbench 40 to rotate along the axial direction, and then plasma processing is carried out by using a plasma emitter 50, so that the activated rubber-coated arc-extinguishing chamber is obtained.
Alternatively, the rotating table 40 may rotate at a speed of 50 rpm.
Optionally, the distance between the plasma nozzle of the plasma emitter 50 and the surface of the arc extinguish chamber silicon rubber 30 is 15mm, the moving speed of the plasma nozzle along the axial direction of the arc extinguish chamber is 100mm/min, and the plasma emitter 50 performs reciprocating motion along the axial direction of the arc extinguish chamber for 2 times of spraying.
Alternatively, the gas flow rate at the nozzle of the plasma emitter 50 is 10 m/s.
And S4, injecting epoxy resin into the activated encapsulation arc-extinguishing chamber, curing, and naturally cooling.
After plasma spraying is carried out on the encapsulated arc-extinguishing chamber, an epoxy resin injection procedure is carried out, the epoxy resin injection is completed within 4 hours after the silicon rubber 30 of the encapsulated arc-extinguishing chamber is activated, wherein the epoxy resin is bisphenol A epoxy resin, and after the epoxy resin is poured, the epoxy resin is cured for 24 hours in an oven with the temperature of 120 ℃, and then the epoxy resin is naturally cooled.
The embodiment of the application introduces the electric field intensity on the surface of the silicon rubber on the inner side of the annular shielding net to the middle of the epoxy resin material through the annular shielding net, and the insulating strength of the arc extinguish chamber is increased through a shielding mode. The silicon rubber on the surface of the arc extinguish chamber is subjected to plasma activation treatment and then epoxy casting, so that the product percent of pass is improved, the problem of surface extension discharge of the 35kV solid insulation arc extinguish chamber is further solved, and the method can be widely applied to the field of production and manufacturing of high-voltage switch cabinet insulation equipment.
The second aspect of the embodiments of the present application provides an arc extinguishing device, which is prepared by using the surface treatment method for an arc extinguishing chamber provided by the first aspect of the embodiments of the present application. The 5 arc control device products are processed and prepared in the embodiment of the application, the electrical performance of the batch of products is qualified, and the design requirements are met.
According to the scheme, the annular shielding net is sleeved outside the arc extinguish chamber, the annular shielding net is connected with the built-in shielding cover of the arc extinguish chamber in an equipotential mode, the arc extinguish chamber is cleaned and heated, the surface of the arc extinguish chamber is coated with silicon rubber to obtain the rubber-coated arc extinguish chamber, then the silicon rubber on the surface of the rubber-coated arc extinguish chamber is activated to obtain the activated rubber-coated arc extinguish chamber, the activated rubber-coated arc extinguish chamber is injected with epoxy resin, then the epoxy resin is solidified, and the epoxy resin is naturally cooled. On the one hand, the electric field intensity on the surface of the silicon rubber on the inner side of the annular shielding net is introduced into the middle of the epoxy resin material through the annular shielding net, and the insulating strength of the arc extinguish chamber is increased through a shielding mode. On the other hand, the silicon rubber on the surface of the arc extinguish chamber is subjected to plasma activation treatment and then epoxy casting, so that the problem of surface extension discharge of the 35kV solid insulation arc extinguish chamber is further solved.
The above description is only for the preferred embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present application, and equivalent alternatives or modifications according to the technical solutions and the application concepts of the present application, which are within the technical scope of the present application.
Claims (10)
1. An arc-extinguishing chamber surface treatment method is characterized by comprising the following steps:
an annular shielding net is sleeved on the outer side of the arc extinguish chamber and is in equipotential connection with an internal shielding cover of the arc extinguish chamber;
cleaning and heating the obtained product obtained in the step, and coating silicon rubber on the surface to obtain a rubber-coated arc-extinguishing chamber;
activating the silicon rubber on the surface of the rubber-coated arc-extinguishing chamber to obtain an activated rubber-coated arc-extinguishing chamber;
and injecting epoxy resin into the activated encapsulation arc-extinguishing chamber, then curing, and naturally cooling.
2. The method for treating the surface of the arc-extinguishing chamber according to claim 1, wherein the step of activating the silicone rubber on the surface of the encapsulated arc-extinguishing chamber to obtain an activated encapsulated arc-extinguishing chamber comprises the following steps:
standing the rubber-coated arc-extinguishing chamber in an oven at 70-80 ℃ for 1-5 hours;
polishing the surface silicon rubber of the rubber-coated arc-extinguishing chamber;
cleaning the surface of the rubber-coated arc-extinguishing chamber by alcohol, and then placing the rubber-coated arc-extinguishing chamber in a 100-150 oven for standing for 2 hours;
and (3) placing the rubber-coated arc-extinguishing chamber processed in the steps on a rotary worktable to rotate along the axial direction, and then carrying out plasma treatment by using a plasma emitter to obtain the activated rubber-coated arc-extinguishing chamber.
3. The arc chute surface treatment method according to claim 2, characterized in that the rotating speed of the rotating table is 50 revolutions/min.
4. The surface treatment method for the arc extinguish chamber according to claim 2, wherein the moving speed of a plasma nozzle of the plasma emitter along the axial direction of the arc extinguish chamber is 100mm/min, and the plasma emitter performs spraying by reciprocating along the axial direction of the arc extinguish chamber for 2 times.
5. The arc chute surface treatment method according to claim 4, characterized in that the gas flow velocity at the plasma emitter nozzle is 10 m/s.
6. The arc extinguish chamber surface treatment method according to claim 1, wherein the annular shielding net is made of a conductive or semiconductive material, the annular shielding net is fixedly connected with a built-in shielding case of the arc extinguish chamber through one or more metal posts, and a central axis of the annular shielding net is in the same direction as a central axis of the arc extinguish chamber.
7. The arc-extinguishing chamber surface treatment method according to claim 1, characterized in that the distance from the annular shielding net to the silicone rubber surface of the encapsulated arc-extinguishing chamber is greater than or equal to 5 mm.
8. The arc-extinguishing chamber surface treatment method according to claim 1, characterized in that the curing temperature of the curing is 120 ℃ and the curing time is 24 h.
9. The arc-extinguishing chamber surface treatment method according to claim 1, characterized in that the epoxy resin is bisphenol a epoxy resin.
10. An arc extinguishing device manufactured by the arc extinguishing chamber surface treatment method according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210886390.1A CN115083809A (en) | 2022-07-26 | 2022-07-26 | Arc extinguishing chamber surface treatment method and arc extinguishing device |
| PCT/CN2022/132666 WO2024021374A1 (en) | 2022-07-26 | 2022-11-17 | Method for treating surface of arc extinguishing chamber, and arc extinguishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210886390.1A CN115083809A (en) | 2022-07-26 | 2022-07-26 | Arc extinguishing chamber surface treatment method and arc extinguishing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115083809A true CN115083809A (en) | 2022-09-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210886390.1A Pending CN115083809A (en) | 2022-07-26 | 2022-07-26 | Arc extinguishing chamber surface treatment method and arc extinguishing device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115083809A (en) |
| WO (1) | WO2024021374A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024021374A1 (en) * | 2022-07-26 | 2024-02-01 | 云南电网有限责任公司临沧供电局 | Method for treating surface of arc extinguishing chamber, and arc extinguishing device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2298598Y (en) * | 1997-01-17 | 1998-11-25 | 西安交通大学 | Vacuum arc-chutes magnetic screening can |
| CN103325610B (en) * | 2013-06-28 | 2015-07-29 | 中国西电电气股份有限公司 | A kind of pole |
| CN110289190B (en) * | 2015-10-23 | 2024-08-06 | 北京瑞恒新源投资有限公司 | Multifunctional capacitive sleeve with vacuum arc-extinguishing chamber |
| CN106098442A (en) * | 2016-08-19 | 2016-11-09 | 河南森源电气股份有限公司 | Vacuum interrupter surface treatment method and pole forming method |
| CN112802717A (en) * | 2021-01-19 | 2021-05-14 | 慈溪益成电器有限公司 | Production process of solid-sealed polar pole for vacuum circuit breaker |
| CN114551147A (en) * | 2022-04-02 | 2022-05-27 | 西安西电开关电气有限公司 | Multisection porcelain shell type vacuum arc-extinguishing chamber with external shielding structure |
| CN115083809A (en) * | 2022-07-26 | 2022-09-20 | 云南电网有限责任公司临沧供电局 | Arc extinguishing chamber surface treatment method and arc extinguishing device |
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2022
- 2022-07-26 CN CN202210886390.1A patent/CN115083809A/en active Pending
- 2022-11-17 WO PCT/CN2022/132666 patent/WO2024021374A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024021374A1 (en) * | 2022-07-26 | 2024-02-01 | 云南电网有限责任公司临沧供电局 | Method for treating surface of arc extinguishing chamber, and arc extinguishing device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024021374A1 (en) | 2024-02-01 |
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